Trouble resolving www.google.com via Google Public DNS

[dgia...@gmail.com]

Hi everyone,

Starting yesterday my network has not been able to access any services behind the www.google.com subdomain (all other Google subdomains are accessible). We are using 8.8.8.8 and 8.8.4.4 as our DNS servers. Here are some dig calls to show what is/isn't resolving.

Davids-MacBook-Pro-2:configs david$ dig @1.1.1.1 www.google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @1.1.1.1 www.google.com +noall +answer

; (1 server found)

;; global options: +cmd

www.google.com. 155 IN A 172.217.6.68

Davids-MacBook-Pro-2:configs david$ dig @8.8.8.8 www.google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @8.8.8.8 www.google.com +noall +answer

; (1 server found)

;; global options: +cmd

;; connection timed out; no servers could be reached

Davids-MacBook-Pro-2:configs david$ dig @8.8.4.4 www.google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @8.8.4.4 www.google.com +noall +answer

; (1 server found)

;; global options: +cmd

;; connection timed out; no servers could be reached

Davids-MacBook-Pro-2:configs david$ dig @1.1.1.1 google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @1.1.1.1 google.com +noall +answer

; (1 server found)

;; global options: +cmd

google.com. 56 IN A 172.217.5.110

Davids-MacBook-Pro-2:configs david$ dig @8.8.8.8 google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @8.8.8.8 google.com +noall +answer

; (1 server found)

;; global options: +cmd

google.com. 30 IN A 172.217.15.110

Davids-MacBook-Pro-2:configs david$ dig @8.8.4.4 google.com +noall +answer

; <<>> DiG 9.8.3-P1 <<>> @8.8.4.4 google.com +noall +answer

; (1 server found)

;; global options: +cmd

google.com. 223 IN A 172.217.15.110

Davids-MacBook-Pro-2:configs david$ 

What can I do to resolve this issue?

[Alex Dupuy]

It is pretty unusual to be getting a lack of response only for a particular hostname, and even more so to have the same problem for both 8.8.8.8 and 8.8.4.4.

If you are still seeing this problem, you could try the following commands that might help us track down the cause.

traceroute -n 8.8.8.8

dig -t TXT test.dns.google.com @8.8.8.8

dig -t TXT o-o.myaddr.$RANDOM.l.google.com @8.8.8.8

[David Giamanco]

Here are the command outputs.

Davids-MacBook-Pro-2:configs david$ traceroute -n 8.8.8.8

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets

 1  * * *

 2  50.233.123.225  2.768 ms  2.479 ms  2.525 ms

 3  50.233.123.209  3.152 ms  3.118 ms  2.989 ms

 4  68.87.226.117  2.671 ms  2.739 ms  2.785 ms

 5  68.85.57.241  4.437 ms  4.605 ms  5.208 ms

 6  68.86.143.93  4.562 ms  4.753 ms  4.568 ms

 7  96.112.146.26  4.672 ms

    96.112.146.22  4.568 ms

    96.112.146.18  5.043 ms

 8  * * *

 9  108.170.236.60  6.226 ms

    108.170.237.8  4.728 ms

    72.14.235.0  6.342 ms

10  108.170.232.59  6.824 ms

    108.170.234.155  5.693 ms

    209.85.142.233  5.501 ms

11  8.8.8.8  4.419 ms  4.383 ms  4.970 ms

Davids-MacBook-Pro-2:configs david$ dig -t TXT test.dns.google.com @8.8.8.8

; <<>> DiG 9.8.3-P1 <<>> -t TXT test.dns.google.com @8.8.8.8

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58506

;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:

;test.dns.google.com. IN TXT

;; ANSWER SECTION:

test.dns.google.com. 5 IN TXT "Thanks for using Google Public DNS."

;; Query time: 28 msec

;; SERVER: 8.8.8.8#53(8.8.8.8)

;; WHEN: Wed May  2 10:32:32 2018

;; MSG SIZE  rcvd: 85

Davids-MacBook-Pro-2:configs david$ dig -t TXT o-o.myaddr.$RANDOM.l.google.com @8.8.8.8

; <<>> DiG 9.8.3-P1 <<>> -t TXT o-o.myaddr.20964.l.google.com @8.8.8.8

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29521

;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:

;o-o.myaddr.20964.l.google.com. IN TXT

;; ANSWER SECTION:

o-o.myaddr.20964.l.google.com. 59 IN TXT "74.125.186.73"

o-o.myaddr.20964.l.google.com. 59 IN TXT "edns0-client-subnet 50.233.123.229/32"

;; Query time: 60 msec

;; SERVER: 8.8.8.8#53(8.8.8.8)

;; WHEN: Wed May  2 10:32:42 2018

;; MSG SIZE  rcvd: 123